[PATCH] sysfs: add necessary Null check in sysfs_do_create_link_sd

[Rui Xiang]

While target_sd or sd are null, it won't need sysfs_put and
should return -ENOENT directly. Here add null check for
target_sd and sd.

Signed-off-by: Rui Xiang <rui.xiang@xxxxxxxxxx>
---
 fs/sysfs/symlink.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/fs/sysfs/symlink.c b/fs/sysfs/symlink.c
index 3ae3f1b..d69b786 100644
--- a/fs/sysfs/symlink.c
+++ b/fs/sysfs/symlink.c
@@ -83,8 +83,10 @@ static int sysfs_do_create_link_sd(struct sysfs_dirent *parent_sd,
 	return 0;
 
  out_put:
-	sysfs_put(target_sd);
-	sysfs_put(sd);
+	if (target_sd)
+		sysfs_put(target_sd);
+	if (sd)
+		sysfs_put(sd);
 	return error;
 }
 
-- 
1.8.2.2

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/